PS3 BC FAT A01 PS2 POWER USAGE

does anyone know how much Watts the fully backwards compatible ps3 use when you play ps2 games? just interested.

my settings:

1.both hd option and smoothing disabled

2. resolution at 480p.

3. fan speed at 37%, temps 58-60 Cell and 47-50 rsx.

4. underclocked both rsx speed options in cfw settings to 300, which makes the rsx sit at 48°, instead of 50° without doing anything.